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The problem The problem araises when a RIR assign a prefix (/28 for example) to an ISP which has several internet links (let us say 3) with different carriers (3 tier 1 carriers, for example) using BGP publications. According to LACNICs (and most other RIRs) policy, the ISP must advertise the /28 through all the 3 links without the possibility of dissagregation. The problem with this policy is that by doing this, the ISP loses direct control of the traffic, not being able to distribute the traffic over the 3 different links. A /28 prefix may have a lot of incoming traffic associated to it, but dissagregation (subnets) of the prefix is banned by the policy.

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ARINs equivalent policy ARIN - Number Resource Policy Manual (NRPM) Equivalent proposal in case of ARIN: to eliminate the 6.5.1.1.c requirement, 6.5. Policies for allocations and assignments 6.5.1. Initial allocation 6.5.1.1. Initial allocation criteria c. Plan to provide IPv6 connectivity to organizations to which it will assign IPv6 address space, by advertising that connectivity through its single aggregated address allocation... And promote the removal of equivalent policy in other RIRs